Wow, thanks for all the suggestions. Being a noob, I did not realize there were so many batteries other than the mega xl (have one coming soon) that could be used with the 510. Thank God for this board, or I would be in the wind.
I had a sleep study the other day and my 901 fell out of my purse. The tech said, "Oh, you're an e-cig person, too" We talked for a while. She has a blu. She knew nothing of this board. Did not even know that she could get different flavored juices, or even about refilling carts. Her boyfriend had just bought her the blu and some carts. Told her I would write down this board's web address for her (did not know it off the top of my head) because she was definitely losing out not knowing more about e-cigs.
Thanks to all
Debbi